The Danish research vessel Dana is used for the Danish participation in the International Bottom Trawl Survey (IBTS), which has the purpose of annually monitoring fish species. Internationally, each nation surveys part of the area, with some overlap in coverage and depth stratification, in a coordinated sampling design.

The IBTS is conducted twice a year in the first and fourth quarters as a depth-stratified survey. The strata are based on sub-divisions and depth layers. Each year the necessary stations are randomly selected before the beginning of the international trawl surveys, from a list of clear haul data. These stations are a stratified randomly selected sub-sample of the possible trawl tracks.

The standard haul is a 30-minutes haul with a towing speed of 3 knots. Trawling only takes place during daylight, defined as the time between 15 minutes past sunrise and 15 minutes before sunset.

Period

Quarter 1

Activity

Here is shown a map with the survey activity. The map shows both valid and invalid stations, a station can be deemed invalid if the haoul could not be conducted within the guilines of the survey manual

Trawl Stations

Each trawl stations consists a haul of 30 minutes where all the catch documented, including litter. Biological samples to determine e.g. stock, age matuity are taken from individual fish.

CTD Stations

CTD (Conductivity - Temperature - Depth), are measured trough the water column, and used to calculate e.g. the oxygen and salinity content, key environmental variables for life in the ocean.

CTD Results

Here is shown a map the results of the CTD measurments at the bottom. The heatmap is made with linear interpolation between measurments, and can be seen as the general trend in the monment of the survey

Bottom oxygen

Bottom temperature

Bottom salinity

Catch Overview

Below is a table with the total catche and catches for selected species, in wiegth and numbers. The numbers are in some instances calculated based on representative subsampling of some abundant species. The maps illustrates for biodiveity the number of different species cougt on each station, and for CPUE (catch per unit effort) the catch in numbers standadized to a unit effort of one hour of hauling.


	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Total Catch	12032.0	168066
Haddock	6382.6	31254	120	600
Whiting	2936.2	24677	70	480
Herring	248.5	7008	70	310
Cod	212.5	156	100	980
Plaice	187.8	1985	60	470

CPUE

CPUE (catch per unit effort) shown as the catch in Numbers rasied to to pr hour of hauling

CPUE for Selected Species

CPUE (catch per unit effort) shown as the catch in Numbers rasied to to pr hour of hauling. The dots indicates the stations, and red dots indicates that a species where not found at all in that station. The scale is different between plots

Cod

Plaice

Whiting

Haddock

Herring

Biodiversity

Shown is the Number of species cought by station

Length Distributions

Here is shown the length distribution For the 10 most abundant comercieal species cought during the survey, allocated to each ship. The black line represents the average length distribution of the 5 years previus surveys.

Sprat

Haddock

Whiting

Common dab

Herring

Norway pout

Blue whiting

Grey gurnard

Plaice

Lemon sole

All species Caught

The table below is an overview of all the different species cought in the survey, devided into the different ices areas covered by the surve.

Area - 20


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Aequipecten opercularis	Queen scallop	0.2	3
Alloteuthis subulata	European common squid	0.0	8	30	60
Alosa fallax	Twaite shad	0.4	1	360	360
Amblyraja radiata	Starry ray	1.3	2	150	520
Argentina silus	Great silver smelt	0.0	1	70	70
Buglossidium luteum	Solenette	0.0	1	110	110
Callionymus lyra	Common dragonet	0.0	1	190	190
Callionymus reticulatus	Reticulated dragonet	0.0	2	100	100
Cancer pagurus	Edible crab	1.8	8	88	142
Clupea harengus	Herring	15.3	259	90	290
Cyclopterus lumpus	Lumpfish	0.2	1	140	140
Echiichthys vipera	Lesser weever	0.0	1	140	140
Engraulis encrasicolus	Anchovy	0.0	2	80	80
Eutrigla gurnardus	Grey gurnard	0.2	4	150	230
Gadus morhua	Cod	13.7	42	210	530
Hippoglossoides platessoides	American plaice	18.1	661	60	210
Limanda limanda	Common dab	14.1	166	100	300
Loligo forbesii	Northern squid	2.1	4	150	380
Lophius piscatorius	Angler fish	4.3	2	360	560
Maurolicus muelleri	Pearlside	0.0	2	40	60
Melanogrammus aeglefinus	Haddock	496.3	1651	230	550
Merlangius merlangus	Whiting	118.6	924	110	480
Merluccius merluccius	Hake	0.1	5	90	210
Microstomus kitt	Lemon sole	0.1	1	200	200
Myoxocephalus scorpius	Sculpin	0.6	2	250	270
Myxine glutinosa	Hagfish	0.0	1	280	280
Nephrops norvegicus	Norway lobster	1.3	9	40	61
Pleuronectes platessa	Plaice	32.0	410	120	330
Pollachius virens	Saithe	20.5	24	310	560
Rossia macrosoma	Stout bobtail squid	0.0	0
Scophthalmus maximus	Turbot	1.1	1	390	390
Sprattus sprattus	Sprat	15.2	3489	60	125
Syngnathidae	Pipefishes and seahorses	0.0	1	120	120
Trachinus draco	Greater weever fish	0.1	1	260	260
Trachurus trachurus	Horse mackerel	0.0	1	130	130
Trisopterus esmarkii	Norway pout	22.3	858	90	190
Trisopterus luscus	Bib	0.1	1	210	210
Trisopterus minutus	Poor-cod	0.8	27	110	180

Area - 4A


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Aequipecten opercularis	Queen scallop	0.2	2
Alloteuthis subulata	European common squid	0.1	27	30	60
Amblyraja radiata	Starry ray	6.6	20	260	490
Argentina silus	Great silver smelt	9.3	247	100	250
Callionymus lyra	Common dragonet	0.1	2	200	230
Callionymus reticulatus	Reticulated dragonet	0.1	7	100	130
Capros aper	Boarfish	0.1	6	100	120
Clupea harengus	Herring	22.3	263	175	310
Eledone cirrhosa	Horned octopus	0.0	1
Enchelyopus cimbrius	Four-bearded rockling	0.0	1	250	250
Etmopterus spinax	Velvet belly lanternshark	0.2	1	400	400
Eutrigla gurnardus	Grey gurnard	5.7	34	180	380
Gadiculus argenteus	Silvery pout	0.1	23	60	140
Gadus morhua	Cod	110.6	60	100	950
Glyptocephalus cynoglossus	Witch	1.1	3	330	430
Helicolenus dactylopterus	Blue-mouth redfish	0.2	3	150	200
Hippoglossoides platessoides	American plaice	4.6	143	50	240
Illex coindetii	Southern shortfin squid	0.8	29	70	120
Lepidorhombus whiffiagonis	Megrim	0.4	1	370	370
Limanda limanda	Common dab	4.0	82	120	310
Lithodes maja	Norway king crab	2.0	11	24	106
Loligo forbesii	Northern squid	5.8	34	50	410
Loligo vulgaris	European squid	0.2	1	170	170
Lophius budegassa	Black-bellied Angler fish	0.3	1	270	270
Lophius piscatorius	Angler fish	37.1	10	500	830
Melanogrammus aeglefinus	Haddock	750.5	2414	120	600
Merlangius merlangus	Whiting	381.7	1319	180	430
Merluccius merluccius	Hake	1.6	28	80	340
Micromesistius poutassou	Blue whiting	275.7	4409	160	370
Microstomus kitt	Lemon sole	1.3	5	220	320
Molva molva	Ling	14.8	7	520	890
Mullus surmuletus	Striped red mullet	0.3	1	270	270
Mustelus asterias	Starry smooth-hound	1.4	2	550	640
Myxine glutinosa	Hagfish	0.0	1	310	310
Nephrops norvegicus	Norway lobster	3.2	50	26	58
Phycis blennoides	Greater forkbeard	0.6	1	400	400
Pleuronectes platessa	Plaice	1.4	5	270	360
Pollachius pollachius	Pollack	10.9	4	550	770
Pollachius virens	Saithe	101.5	106	290	1080
Rossia macrosoma	Stout bobtail squid	0.2	12
Scomber scombrus	Mackerel	0.1	1	220	220
Scophthalmus rhombus	Brill	0.4	1	330	330
Todaropsis eblanae	Lesser flying squid	0.8	14	40	120
Trachurus trachurus	Horse mackerel	2.1	6	330	380
Trisopterus esmarkii	Norway pout	75.6	4658	80	170
Trisopterus luscus	Bib	0.6	7	180	220
Trisopterus minutus	Poor-cod	2.1	45	110	220

Area - 4B


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Aequipecten opercularis	Queen scallop	0.8	20
Agonus cataphractus	Pogge	0.6	40	50	150
Alloteuthis subulata	European common squid	36.8	12493	20	90
Amblyraja radiata	Starry ray	27.3	110	80	480
Ammodytes marinus	Lesser sandeel	0.3	108	70	150
Anarhichas lupus	Catfish	0.2	1	290	290
Aphia minuta	Transparent goby	0.0	26	30	50
Arnoglossus laterna	Scaldfish	0.9	99	70	140
Atherina presbyter	Sand-smelt	0.0	2	70	70
Buglossidium luteum	Solenette	4.4	517	60	120
Callionymus lyra	Common dragonet	1.1	36	60	210
Callionymus reticulatus	Reticulated dragonet	0.0	10	30	110
Cancer pagurus	Edible crab	27.1	61	69	200
Chelidonichthys cuculus	Red gurnard	0.2	2	170	270
Chelidonichthys lucerna	Tub gurnard	1.7	8	240	330
Clupea harengus	Herring	210.9	6486	70	295
Echiichthys vipera	Lesser weever	0.9	32	100	150
Eledone cirrhosa	Horned octopus	0.2	3
Enchelyopus cimbrius	Four-bearded rockling	3.6	73	120	300
Engraulis encrasicolus	Anchovy	0.2	31	70	150
Entelurus aequoreus	Snake pipefish	0.0	1	420	420
Eutrigla gurnardus	Grey gurnard	144.1	2442	50	380
Gadus morhua	Cod	88.2	54	190	980
Gasterosteus aculeatus	Three-spined stickleback	0.0	3	60	60
Glyptocephalus cynoglossus	Witch	7.4	37	170	430
Helicolenus dactylopterus	Blue-mouth redfish	0.1	1	170	170
Hippoglossoides platessoides	American plaice	28.6	914	40	270
Homarus gammarus	European lobster	7.1	4	101	166
Hyperoplus lanceolatus	Greater sandeel	0.1	6	165	195
Illex coindetii	Southern shortfin squid	0.0	3	60	80
Leucoraja naevus	Cuckoo ray	1.3	2	410	490
Limanda limanda	Common dab	765.4	15630	40	300
Liparis liparis	Sea snail	0.2	3	130	140
Liparis montagui	Montague’s seasnail	0.0	1	80	80
Lithodes maja	Norway king crab	13.0	34	67	120
Loligo forbesii	Northern squid	18.2	72	100	380
Loligo vulgaris	European squid	19.0	56	120	460
Lophius piscatorius	Angler fish	18.2	11	180	640
Lumpenus lampretaeformis	Snake blenny	0.0	1	290	290
Maurolicus muelleri	Pearlside	0.0	8	40	60
Melanogrammus aeglefinus	Haddock	5135.7	27189	150	520
Merlangius merlangus	Whiting	2435.9	22434	70	410
Merluccius merluccius	Hake	0.5	3	200	340
Microchirus variegatus	Thickback sole	0.1	2	120	150
Microstomus kitt	Lemon sole	19.4	271	120	310
Mullus surmuletus	Striped red mullet	2.6	35	120	250
Mustelus asterias	Starry smooth-hound	10.5	25	370	590
Myoxocephalus scorpius	Sculpin	2.9	28	90	240
Myxine glutinosa	Hagfish	0.1	4	130	310
Nephrops norvegicus	Norway lobster	20.1	493	21	58
Pecten maximus	Great scallop	14.1	45
Petromyzon marinus	Sea lamprey	0.0	1	160	160
Phrynorhombus norvegicus	Norwegian topknot	0.0	4	60	70
Platichthys flesus	Flounder	0.9	4	240	300
Pleuronectes platessa	Plaice	154.4	1571	60	470
Pomatoschistus spp.	Sand gobies	0.4	615	30	80
Raja brachyura	Blonde ray	2.2	1	630	630
Raja clavata	Thornback ray	16.7	7	400	850
Raja montagui	Spotted Ray	10.0	19	290	620
Rossia macrosoma	Stout bobtail squid	0.2	94
Sardina pilchardus	Pilchard	0.1	10	80	110
Scomber scombrus	Mackerel	0.3	1	330	330
Scophthalmus maximus	Turbot	2.6	3	290	440
Scophthalmus rhombus	Brill	3.9	7	280	420
Scyliorhinus canicula	Lesser-spotted dogfish	12.9	29	130	640
Sepia officinalis	Common cuttlefish	0.3	3	60	110
Sepiola atlantica	Atlantic bobtail squid	0.0	13
Solea solea	Sole	3.2	11	200	400
Sprattus sprattus	Sprat	123.8	52693	50	145
Syngnathus acus	Great pipefish	0.0	3	210	310
Syngnathus rostellatus	Lesser pipefish	0.0	3	110	120
Syngnathus typhle	Broad-nosed pipefish	0.0	2	190	230
Todaropsis eblanae	Lesser flying squid	0.1	2	40	80
Trachinus draco	Greater weever fish	0.9	4	260	360
Trachurus trachurus	Horse mackerel	1.5	25	100	330
Trisopterus esmarkii	Norway pout	5.5	256	90	210
Trisopterus luscus	Bib	0.8	7	170	240
Trisopterus minutus	Poor-cod	0.8	24	100	200

Quarter 3

Activity

Trawl Stations

Each trawl stations consists a haul of 30 minutes where all the catch documented, including litter. Biological samples to determine e.g. stock, age matuity are taken from individual fish.

CTD Stations

CTD (Conductivity - Temperature - Depth), are measured trough the water column, and used to calculate e.g. the oxygen and salinity content, key environmental variables for life in the ocean.

CTD Results

Bottom oxygen

Bottom temperature

Bottom salinity

Catch Overview


	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Total Catch	47435.3	878256
Haddock	17373.2	64757	100	510
Whiting	10200.9	161429	50	450
Herring	4038.9	198319	65	325
Plaice	607.8	4704	110	470
Cod	93.3	219	100	700

CPUE

CPUE (catch per unit effort) shown as the catch in Numbers rasied to to pr hour of hauling

CPUE for Selected Species

Cod

Plaice

Whiting

Haddock

Herring

Biodiversity

Shown is the Number of species cought by station

Length Distributions

Herring

Sprat

Whiting

Horse mackerel

Common dab

Haddock

Mackerel

Grey gurnard

Norway pout

Plaice

All species Caught

The table below is an overview of all the different species cought in the survey, devided into the different ices areas covered by the surve.

Area - 20


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Alloteuthis subulata	European common squid	0.1	19	30	130
Arnoglossus laterna	Scaldfish	0.0	1	150	150
Callionymus lyra	Common dragonet	0.4	8	160	200
Cancer pagurus	Edible crab	7.8	22	89	174
Chelidonichthys lucerna	Tub gurnard	0.9	2	320	370
Clupea harengus	Herring	383.4	8945	145	255
Echiichthys vipera	Lesser weever	0.3	8	120	160
Eledone cirrhosa	Horned octopus	0.2	1
Eutrigla gurnardus	Grey gurnard	375.4	3889	170	330
Gadus morhua	Cod	59.0	154	100	680
Hippoglossoides platessoides	American plaice	58.0	904	120	240
Homarus gammarus	European lobster	0.5	1	95	95
Hyperoplus lanceolatus	Greater sandeel	0.3	7	230	300
Illex coindetii	Southern shortfin squid	0.4	8	80	130
Limanda limanda	Common dab	555.4	5713	130	290
Loligo	Loligo sp	68.4	6257	40	120
Loligo forbesii	Northern squid	6.8	49	90	230
Loligo vulgaris	European squid	3.4	7	220	300
Lophius piscatorius	Angler fish	5.5	1	760	760
Melanogrammus aeglefinus	Haddock	2448.8	5732	270	490
Merlangius merlangus	Whiting	376.2	2382	80	340
Merluccius merluccius	Hake	51.6	29	260	980
Microstomus kitt	Lemon sole	13.6	112	150	340
Nephrops norvegicus	Norway lobster	0.1	1	53	53
Pleuronectes platessa	Plaice	45.9	365	150	470
Scomber scombrus	Mackerel	1181.8	6028	250	350
Scophthalmus maximus	Turbot	1.3	2	320	330
Scophthalmus rhombus	Brill	3.1	3	310	530
Sprattus sprattus	Sprat	8.5	540	105	145
Squalus acanthias	Spurdog	7.5	3	770	920
Todaropsis eblanae	Lesser flying squid	0.1	2	90	90
Trachinus draco	Greater weever fish	30.5	192	210	380
Trachurus trachurus	Horse mackerel	32.4	124	70	370
Trisopterus esmarkii	Norway pout	12.2	396	70	170
Trisopterus minutus	Poor-cod	0.0	1	150	150

Area - 4B


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Aequipecten opercularis	Queen scallop	1.4	25
Agonus cataphractus	Pogge	0.2	21	90	150
Alloteuthis subulata	European common squid	40.8	11346	10	140
Amblyraja radiata	Starry ray	7.4	26	160	440
Ammodytes marinus	Lesser sandeel	101.0	10085	95	190
Arnoglossus laterna	Scaldfish	0.6	58	80	140
Buglossidium luteum	Solenette	1.1	105	70	120
Callionymus lyra	Common dragonet	3.7	96	130	230
Callionymus maculatus	Spotted dragonet	0.0	2	140	140
Cancer pagurus	Edible crab	48.7	84	97	206
Chelidonichthys lucerna	Tub gurnard	6.2	23	210	380
Clupea harengus	Herring	2565.6	54145	70	325
Echiichthys vipera	Lesser weever	0.8	28	80	160
Eledone cirrhosa	Horned octopus	0.1	1
Enchelyopus cimbrius	Four-bearded rockling	1.5	33	110	280
Engraulis encrasicolus	Anchovy	0.0	2	50	60
Entelurus aequoreus	Snake pipefish	0.0	1	390	390
Eutrigla gurnardus	Grey gurnard	415.1	5681	80	390
Gadus morhua	Cod	33.9	64	230	700
Glyptocephalus cynoglossus	Witch	3.0	16	240	370
Hippocampus hippocampus	Short-snouted seahorse	0.0	1	110	110
Hippoglossoides platessoides	American plaice	80.1	2310	100	240
Homarus gammarus	European lobster	4.8	4	97	163
Hyperoplus lanceolatus	Greater sandeel	3.0	98	170	295
Illex coindetii	Southern shortfin squid	9.4	118	90	220
Leucoraja naevus	Cuckoo ray	1.4	2	470	540
Limanda limanda	Common dab	2624.1	51849	60	380
Lithodes maja	Norway king crab	5.6	10	82	125
Loligo	Loligo sp	35.5	1208	40	130
Loligo forbesii	Northern squid	46.5	2356	20	340
Loligo vulgaris	European squid	6.6	10	260	320
Lophius piscatorius	Angler fish	16.2	7	320	650
Lycodes gracilis	Vahls eelpout	0.0	1	200	200
Melanogrammus aeglefinus	Haddock	14920.9	59016	100	510
Merlangius merlangus	Whiting	8863.1	144825	50	450
Merluccius merluccius	Hake	17.3	15	150	790
Microchirus variegatus	Thickback sole	0.0	2	70	130
Micromesistius poutassou	Blue whiting	121.9	1057	200	350
Microstomus kitt	Lemon sole	147.0	1793	140	310
Molva molva	Ling	1.5	1	640	640
Mullus surmuletus	Striped red mullet	2.2	64	50	300
Mustelus asterias	Starry smooth-hound	78.5	43	470	1050
Myoxocephalus scorpius	Sculpin	0.2	4	30	200
Myxine glutinosa	Hagfish	0.1	3	200	320
Nephrops norvegicus	Norway lobster	6.4	96	29	59
Pecten maximus	Great scallop	1.9	5
Platichthys flesus	Flounder	1.5	9	200	300
Pleuronectes platessa	Plaice	531.2	4008	110	440
Pollachius virens	Saithe	3.8	5	390	480
Raja brachyura	Blonde ray	47.3	16	490	960
Raja clavata	Thornback ray	31.6	19	410	810
Raja montagui	Spotted Ray	5.6	6	460	620
Sardina pilchardus	Pilchard	2.9	632	60	250
Scomber scombrus	Mackerel	3485.8	13986	70	390
Scophthalmus maximus	Turbot	22.8	23	230	470
Scophthalmus rhombus	Brill	2.3	5	300	330
Scyliorhinus canicula	Lesser-spotted dogfish	117.5	186	250	670
Solea solea	Sole	1.6	5	250	390
Sprattus sprattus	Sprat	505.1	89723	55	145
Squalus acanthias	Spurdog	0.8	3	250	520
Todaropsis eblanae	Lesser flying squid	0.8	5	90	190
Trachinus draco	Greater weever fish	8.8	49	180	380
Trachurus trachurus	Horse mackerel	357.4	33183	30	370
Trisopterus esmarkii	Norway pout	48.3	5923	60	200
Trisopterus luscus	Bib	5.1	124	120	200
Trisopterus minutus	Poor-cod	0.2	6	90	170
Zeus faber	John dory	0.3	1	280	280

Area - 4C


Latin name	English name	Weight (kg)	Number	Min. Length (mm)	Max. Length (mm)
Aequipecten opercularis	Queen scallop	0.1	5
Agonus cataphractus	Pogge	0.1	5	100	130
Alloteuthis subulata	European common squid	10.9	1308	20	140
Ammodytes marinus	Lesser sandeel	0.2	17	115	170
Arnoglossus laterna	Scaldfish	0.1	3	100	160
Blennius ocellaris	Butterfly blenny	0.0	2	80	90
Buglossidium luteum	Solenette	0.1	9	80	120
Callionymus lyra	Common dragonet	1.9	49	120	240
Cancer pagurus	Edible crab	13.6	36	94	172
Chelidonichthys cuculus	Red gurnard	1.2	9	210	280
Chelidonichthys lucerna	Tub gurnard	3.7	10	190	430
Clupea harengus	Herring	1089.8	135229	65	255
Dicentrarchus labrax	Bass	3.0	3	380	520
Echiichthys vipera	Lesser weever	18.3	774	60	180
Engraulis encrasicolus	Anchovy	0.0	1	150	150
Entelurus aequoreus	Snake pipefish	0.0	3	190	410
Eutrigla gurnardus	Grey gurnard	11.9	112	110	350
Gadus morhua	Cod	0.4	1	330	330
Galeorhinus galeus	Tope	1229.1	95	1220	1620
Helicolenus dactylopterus	Blue-mouth redfish	0.2	2	170	190
Homarus gammarus	European lobster	23.6	52	55	135
Hyperoplus lanceolatus	Greater sandeel	0.7	18	205	300
Lampetra fluviatilis	River lamprey	0.1	1	310	310
Limanda limanda	Common dab	415.1	7608	60	270
Liparis liparis	Sea snail	0.0	1	60	60
Liparis montagui	Montague’s seasnail	0.0	1	80	80
Loligo forbesii	Northern squid	69.1	1848	20	280
Loligo vulgaris	European squid	6.0	37	90	310
Maja squinado	Common spider crab	2.5	2	140	150
Melanogrammus aeglefinus	Haddock	3.5	10	300	380
Merlangius merlangus	Whiting	961.7	14222	60	350
Microstomus kitt	Lemon sole	3.3	26	150	290
Mullus surmuletus	Striped red mullet	6.5	79	50	270
Mustelus asterias	Starry smooth-hound	111.0	58	530	1140
Myoxocephalus scorpius	Sculpin	0.4	12	110	140
Pholis gunnellus	Butter fish	0.0	1	160	160
Platichthys flesus	Flounder	1.6	6	240	340
Pleuronectes platessa	Plaice	30.7	331	110	350
Pomatoschistus spp.	Sand gobies	0.1	56	30	50
Raja brachyura	Blonde ray	7.1	3	600	680
Raja clavata	Thornback ray	16.6	16	250	760
Raja montagui	Spotted Ray	16.2	33	210	560
Sardina pilchardus	Pilchard	307.3	36590	50	240
Scomber scombrus	Mackerel	420.7	2377	130	410
Scophthalmus maximus	Turbot	1.0	3	250	280
Scophthalmus rhombus	Brill	1.5	2	260	430
Scyliorhinus canicula	Lesser-spotted dogfish	97.5	213	140	660
Sepia officinalis	Common cuttlefish	3.9	9	120	160
Sepiola atlantica	Atlantic bobtail squid	0.0	1
Solea solea	Sole	9.1	137	140	310
Sprattus sprattus	Sprat	289.6	81373	50	135
Taurulus bubalis	Sea scorpion	0.3	7	120	180
Trachinus draco	Greater weever fish	1.0	5	140	380
Trachurus trachurus	Horse mackerel	1072.0	58417	50	310
Trisopterus esmarkii	Norway pout	2.2	176	80	150
Trisopterus luscus	Bib	1.2	10	130	290
Trisopterus minutus	Poor-cod	20.1	276	100	220
Zeus faber	John dory	1.4	3	290	290

Danish International Bottom Trawl Survey

Period

Quarter 1

Activity

Trawl Stations

CTD Stations

CTD Results

Bottom oxygen

Bottom temperature

Bottom salinity

Catch Overview

CPUE

CPUE for Selected Species

Cod

Plaice

Whiting

Haddock

Herring

Biodiversity

Length Distributions

Sprat

Haddock

Whiting

Common dab

Herring

Norway pout

Blue whiting

Grey gurnard

Plaice

Lemon sole

All species Caught

Area - 20

Area - 4A

Area - 4B

Quarter 3

Activity

Trawl Stations

CTD Stations

CTD Results

Bottom oxygen

Bottom temperature

Bottom salinity

Catch Overview

CPUE

CPUE for Selected Species

Cod

Plaice

Whiting

Haddock

Herring

Biodiversity

Length Distributions

Herring

Sprat

Whiting

Horse mackerel

Common dab

Haddock

Mackerel

Grey gurnard

Norway pout

Plaice

All species Caught

Area - 20

Area - 4B

Area - 4C